After test driving several cars (Mazda3, MINI, Subaru WRX, Rabbit etc) I decided to purchase the GTI. I knew right away that it was the car I wanted. It is so much fun to drive. It is very powerful, handles corners great, the interior is very comfortable, it has a quiet ride, gets good gas mileage, is safe, etc. It comes with built in Sirius Satellite radio. I was concerned about the electrical issues VWs are known for when researching cars, but was reassured by the fact that the GTI is made only in Germany and that the electrical issues have been addressed.
The interior, the quiet ride, satellite radio, the exterior (I've had many compliments), the pep, and the safety features.
The only thing I can think of at this time is that I'd like it if the moonroof was a little larger. Otherwise, I absolutely adore my new GTI!